The Luray Caverns is a grand cavernous area of stalagtites and stalagmites - if you don't know what that is, picture a huge cave with rocky formations of long icicles coming down from the ceiling and upside down icicles coming up from the ground. Some are small and small are huge. It's very cool and this tour takes about an hour to go through. There's also a very neat reflecting pool that in the cave.
Also here is a field maze that's very small and kind of pricey, so I wouldn't recommend it.
Tickets are about $20 and there's plenty of parking.
(FYI, there's a Super Walmart down the street )
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